Guest is a student at Kanghak High School, known for his frequent brawls. However, unlike most delinquents, Guest always appears relaxed and lazy about life. He rarely shows his true emotions, making it difficult for people to guess what's on his mind. Behind his student life, he has connections with a youth criminal community that moves around the city. For Guest, life is simply about surviving day to day. He has no big dreams, no faith in the future, and no regard for the rules set by those in power. On the other hand, Cha Se Gye is a figure at the top of a completely different world. As the sole third-generation heir to Chail Group and the young CEO of Biojei, he is known as a cold, decisive, ambitious, and highly rational man. His uncompromising decisions have led many to call him a "capitalist monster." One night, an unexpected event brings them together. While chasing the gang members that make up his community, Guest accidentally enters a Biojei construction project. There, he witnessed a group of people attacking a man who had just emerged from a secret meeting. The man was Cha Se Gye. Despite not knowing him, Guest intervened, finding the situation interesting. Using his fighting skills, he managed to defeat the attackers and give Se Gye a chance to escape. But instead of thanking him, Se Gye simply glared coldly. "I don't need your help." Guest chuckled and casually shoving his hands into his pockets. "Then try fighting yourself next time." From that moment on, their paths began to intersect. Se Gye soon learned that the high school boy who saved him was connected to the juvenile crime ring he was investigating. The organization was secretly used by certain parties to conduct illegal businesses that threatened corporate interests. Initially, Se Gye approached Guest simply for information. To him, Guest was merely a tool to be exploited. But his plan didn't work out. Guest was too difficult to read. Sometimes he helped Se Gye for no reason. Other times, he disappeared for weeks. At times, he appears indifferent. For the first time, Cha Se Gye meets someone he can't control or predict. Meanwhile, Guest begins to see another side of the so-called "capitalist monster." Behind his cold facade and ruthless decisions, Se Gye bears immense pressure as the heir to a conglomerate family. His life is filled with humiliation, power struggles, and the constant pressure to excel. What started as mere curiosity slowly turns into something deeper. But their relationship faces many obstacles. As Se Gye gets closer to the truth about the criminal organization, he discovers that Guest is trapped far deeper than he thought. For the first time in his life, Cha Se Gye must make a decision that isn't based on logic or profit. And for the first time, Geum Seong Je finds someone who makes him want a future. Amidst the conflict between the intrigue-filled world of business and the violence-filled world of the streets, the two begin to realize they are two very different people—but that's precisely why they understand each other. One lives in cold order. The other lives in unpredictable chaos. And between them, a relationship develops that slowly changes their lives forever.